CN3703

@@ -0,0 +1,56 @@+# CN3703++**ShangHai Consonance Elec** · Battery Management · TSSOP-16++CN3703 from ShangHai Consonance Elec, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VG | power_out | Internal voltage regulator output. Supplies power to the internal gate-drive circuitry. Connect a 100 nF ceramic capacitor between VG and VCC. |+| 2 | PGND | power_in | Power ground return for the high-current gate-drive circuitry. |+| 3 | GND | power_in | Analog ground reference for the internal control circuitry. |+| 4 | CHRG | output | Open-drain charge-status output (active-low). Internal transistor pulls this pin low while charging; high-impedance otherwise. Sink current typ. 12 mA at V_CHRG=1V; leakage <1 uA at 25V. |+| 5 | DONE | output | Open-drain end-of-charge status output (active-low). Internal transistor pulls this pin low when charging terminates; high-impedance otherwise. Sink current typ. 12 mA at V_DONE=1V; leakage <1 uA at 25V. |+| 6 | TEMP | input | Battery temperature-sense input. Connect an NTC thermistor (10 kΩ at 25°C) between TEMP and GND. Internal 50 uA pull-up; upper threshold 1.61 V, lower threshold 0.175 V. |+| 7 | EOC | input | End-of-charge current programming input. Connect a resistor R_ext from EOC to GND (or short to GND) to set the termination current: I_EOC = 1.278×(14350+R_ext)/(R_CS×1e6). R_ext must be ≤100 kΩ. |+| 8 | COM1 | passive | Loop compensation input 1. Connect a 470 pF capacitor between COM1 and GND. |+| 9 | COM2 | passive | Loop compensation input 2. Connect a 120 Ω resistor in series with a 220 nF capacitor between COM2 and GND. |+| 10 | test | input | Test pin. Must be tied to GND in normal operation. |+| 11 | COM3 | passive | Loop compensation input 3. Connect a 100 nF capacitor between COM3 and GND. Absolute max voltage to GND is 6.5 V. |+| 12 | NC | unconnected | No internal connection. |+| 13 | CSP | input | Charge-current sense positive input. Together with BAT, senses the voltage across the external current-sense resistor R_CS to regulate the charging current (V_CS = 200 mV typ; I_CH = 200 mV / R_CS). |+| 14 | BAT | input | Battery voltage-sense input and current-sense negative input. Internal precision resistor divider and reference set the 12.6 V constant-voltage float level. Also serves as the return for the CSP current-sense measurement. |+| 15 | VCC | power_in | External supply input (7.5-28 V) and also the internal circuit's supply rail. Decouple to GND with a bulk/filter capacitor. UVLO threshold ~6 V typical. |+| 16 | DRV | output | Gate-drive output for the external P-channel power MOSFET. Referenced to VCC: V_H ≈ VCC−60 mV (I=−10 mA), V_L ≈ VCC−6.5 V (I=0 mA). PWM switching frequency 300 kHz typ, max duty 94%. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | ShangHai Consonance Elec |+| Package | TSSOP-16 |+| Category | PMIC |+| Pins | 16 |++## Ordering variants++- `CN3703`++## CAD (KiCad official)++- Symbol: `CN3703`+- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`+- 3D model: TSSOP-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [ShangHai Consonance Elec datasheet](docs/cn3703-datasheet.pdf) (11 pp, sha256 `86648ccf3673c5c3`, retrieved 2026-08-17, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/cn3703-datasheet.pdf)

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